Metal door for ovens and the like



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April 27 1926.

` W. C. LINDEMANN METAL DOOR FOR oVENs AND THE LIKE 8 W I5 C noe/nto@Patented Apr. 27, 1926.

UNITED STATES PATENT OFFICE.

WALTER C. LINDEMANN, OF MILWAUKEE VIISCONSIN, ASSIGNOR TO A. J'. LINDE-MANN & HOVERSON COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OFWISCONSIN.

METAL DOOR FOR OVENS AND THE LIKE.

Application led September 27, 1924. Serial No. 740,156.

To @ZZ whomvmay Concern.'

Be it known that I, lVALrnR C. Lin-nn- MANN, a citizen of the UnitedStates, and a resident of the city of Milwaukee, in the county ofhlilwaukee, State of Wisconsinl have invented certain new and usefulImprovments in Metal Doors for Ovens and the like, of which thefollowing is a specification.

This invention relates generally to the mounting of hingd closuremembers such as oven doors and more particularly to improvements inhinge and closure structures for use with closure members of this type.

In the manufacture of stoves and ranges of the type in which ovens areprovided considerable difficulty has been had in the effective mountingof the hinged doors used with such ovens in that the providing ofvsuit-able hinges for such doors has presented a particular problem forthe reason that a hinge structure adapted for this purpose has notheretofore been provided which successfully combined a satisfactorymechanical effectiveness of operation together with a relatively lowcost of manufacture. The provision of satisfactory journal or pintlemembers for the hinge structures has called for comparatively expensivecutting and machining operations which is obviated by the use of thehereinafter describedhinge structure.

-The invention includes a hinge jointl in which the bearing member iscarried by the door or closure device and consists merely of 'a roundednotch suitably disposed in a bracket member projecting from the lowerextremity of the door. The complementary, that is, the journal orpintlemember, `takes the form of a removable cylindrical section formedof sheet steel, or other suitably resistant material, the journal memberbeing removably mounted in. the lower end of a vertical slot in the wallof the oven through which the bearing' member on the door projects.

Another feature of the.invention consists in an improved latch orlocking device of the spring pressed type which automatically engageswith a` keeper when the door is swung to closed position to hold thedoor closed until the latch is deliberatelyT moved to releasing positionby the act` of an operator.

Otherifeatures of the invention will be hereinafter referred to.

In the drawings, in which a preferred embodiment of the invention hasbeen selected for illustration,

Figure 1 is a view in front elevation of an oven door equipped withhinge and latch devices embodying the invention.

Figure 2 is a view in side elevation and partly in section of the partsshown in F igure 1.

Figure 3 is a plan view of a hinge journal or pintle member forming partof the invention.

Figure .4 is an end view of the device shown in Figure 3.'

Figure 5 is a longitudinal sectional View.

taken on the line 5 5 of Figure 4.

Figure 6 is a view showinga method of mounting the journal member shownin Figure 8 in position toreceive the bearing portion of the hingestructure.

Figure 7 is a view of the parts shown in Figure 1 taken from the insideof the door and with parts broken away to show the internalconstruction.

Figure 8 is a sectional view taken on the line 8-8 of F igure'7 Figure 9is an enlarged detail of the latch and adj acentparts as shown in Figure8.

Referring to the drawings for a more detailed description of theinventiomat 1() there is shown an oven door construction mounted inhinged relation to the framework 11 of the oven in connection with whichthe door 10 is used. The oven door 10 is hinged to rock about itslowermost eX- t-remity on a horizontal axis so that in order to open thedoor the handle member 12 is grasped and the door is swung outwardly anddownwardly to provide access to the oven. The opposite extremities ofthe lowermost portion of the door 10 are prcvided with laterallyextending lugs 13 which serve to support hinge member 14 which enterslots 15 formed in the oven framework 11 outside the lateral edges ofthe oven door opening. The hinge members 14 have a hook-shapedconformation and extend inwardly through the frame member 11 and splithollow cylindrical sections fitted into place at the lower ends of theslots 15 in the oven framework 11.

In order to fit the journal members 18 securely in immovable position inthe receiving slots 15, the cylindrical sections are split throughouttheir lengths along one side and are provided with notches 19 inpositions diametrically opposite the slitted opening 20. With thisconstruction the journal member maybe fitted into position as is shownin Figure 6 of the drawing by tilting the cylindrical section as at Aand then swinging it to its horizontal position as at B so that when inits final horizontal position at the bottom of the slot 15 the notches19 receive the lateral edges of the slot 15. It will be clear that theportion 21 of the cylindrical shell 18 included between the inner endsof the notches 19 isof the same length as the width of the slot 15 so asto prevent longitudinal movement of the cylinder 18 resting in itsoperative position at the bottom of the slot. The passing of the slittedportion 21 of the cylinder 18 downwardly below the lower edge of theslot 15 prevents rotation of the cylinder 18 on its seat so that animmovable and cylindrical journal or pintle member is' formed on whichthe hinge member 14 ofthe door turns in swinging the door to its open orclosed position.

The provison of the detachable or removable journal members 18 obviatesthe necessity for providing a machined or turned. cylinder member in thewall of the oven frame member and also does away with the use of'cylinder members carried by brackets which would require the use ofscrews or bolts for holding the parts in position. I am thus enabled toeffect a considerable economy in the manufacture of' hinge parts of thisgeneral nature and, in addition, an effective and easily operable hingestructure is provided. Because of the shell or skeleton-like nature ofthe hollow journal member a considerable heat insulating effect isprovided whch insures the operation of the parts without interference byexpansion effects.

The handle member 12 referred to is connected directly to the outerframe member of the oven door 10 so that a pull exerted on the handlewill swing the door outwardly from its closed position. A latch member22 is carried between the inner and outer shells of the door 10 andprojects upwardly into a keeper 23 formed in the frame member 11 whenthe door is swung to closed position. The latch member or bolt 22 isprovided with laterally extending spring extension members 24 which maybe formed integrallyl therewith. The spring extension members 24 are soengaged by inwardly extending brackets or lugs 25 carried by the outerwall of the door casing that the latch is under constant tension to moveupwardly into position tok engage the keeper 23. At the same time thedisposition of the spring engaging lugs 25 permits the retraction of thewedgeshaped catch 22 when a push or pull is eX- erted on the doorthrough the handle member 12.

Vhen the door 10 is swung outwardly and downwardly tol its lowermostposition, the inner extensions 26 'of the hinge members 14 are so formedthat they will engage the inner wall of the frame member 11 above theslots 15 and serve as stop members to pre-.

held in position entirely by the door lining by means of the lugs 25 andthe lining, proper, which prevents the spring extension members 24 frommoving laterally. The said cx tension members may be made of sufiicientwidth to fit loosely between the walls of the door and thus be held bysaid walls against such movement.

Vhat I claim is :e

l. In a hinged-door construction, a frame member provided with aperturesadjacent the opposite extremity of the lower edge of the door opening, adoor, and hinge members carried by the door adjacent the lower edgethereof, said hinge members being formed andarranged to extend throughsaid perforatio'ns, to substantially fill the same at closed position soas to prevent substantial.

vertical movement, and to have bearing support therein in the openingand closing movements ofthe door and a latch at the upper part of thedoor adapted to hold said hinge members in engagement with saidbearings.

2. In a hinged-door construction, a frame member provided with aperturesadjacent the opposite extremities of the lower edge of the door opening,a door, hinge members c arried by the door adjacent the lower edgethereof, said hinge members being formed and arranged to extend throughsaid perfor-a tions, to substantially fill the same at closed positionlso as to prevent substantial vertical movement, and to have bearingsupport therein in the opening and closing movements of-the door and alatch at the upper part of' the door adapted to hold said hinge membersin engagement with said bearings, and said hinge members being providedwith extensions acting to engage the inner surface of the frame memberto limit the extent of opening of the door.

3. In an oven-door construction, a frame member provided with slotsadjacent the opposite extremities of the lower edge of the door opening,removable journal members mounted in the slots, and hinge bearingmembers carried by the door, said hinge bearing members being formed toextend through said slots and to have bearing support on said journalmembers and a latch at the upper part of the door adapted to hold saidhinge members in engagement with said bearings.

et. In an oven-door construction, a frame member provided with slotsadjacent the op'I posite extremities of the lower edge of the dooropeninfr, journal members in the form of removable cylindrical membersmounted in the slots, and hinge members carried by Vthe door, said hingemembers being formed to extend through said slots and provided withrounded notches for bearing engage.- ment with the cylindrical members.

5. In an oven-door construction, a frame member provided with slotsadjacent the opposite extremities of the lower edge ofthe dooropening,journal members in the form of split cylindrical shells mountedin the slots with the lower edges of the slots received in the clefts inthe shells, and hinge members carried by the door, said hinge membersbeing formed to extend through said slots and provided with roundednotches for bearing engagement with the cylindrical members.

6. In an oven-door construction, a frame member provided with slotsadjacent the opposite extremities of the lower edge of thedoor opening,journal members in the form of removable cylindrical members mounted inthe slots, hinge members carried by the door, said hinge members beingformed to extend through said slots and provided with rounded notchesfor bearing engagement with the cylindrical members, and stop memberscarried by the hinge members for engaging the frame member to limit theextent of opening of the door.

7. In an oven-door construction, a frame member provided with slotsadjacent the opposite extremities of the lower edge of the door opening,journal 'members in the form of split cylindrical shells mounted in theslots with the lower edges of the slots received in the clefts in theshells, hinge members carried bythe door, said hinge members beingformed to extend through said slots and provided with rounded notchesfor bearing engagement with the cylindrical members, and stop memberscarried by the hinge members for engaging the frame member to limit theextent of opening'of the door.

8. In an oven-door construction, a frame member. provided with slotsadjacent the opposite extremities of the lowerl edge of the dooropening, journal members in the `form of Isplit cylindrical shellsmounted in said slots and provided with rounded notches' for bearingengagement with the cylindrical shells, stop members carried by thehinge members for engaging the frame member to limit the extent ofopening of the door, and spring means engaging the hinge members to`assist in swinging the door to closed position.

9. A hinged door construction for ovens comprising a frame having anopening adapted to be closed by a door, a portion of said frameextending inwardly from the outer face thereof along the upper edge ofsaid opening, a door hinged near the opposite edge of said opening,hinges therefor within the outer portion of the door said door having abody portion adapted to fit the opening and close the same and anoverlapping portion extending beyond said body portion outside theopening and overlapping the vertical edge-s thereof to form a sealclosing and protecting the crack between said body portion and saidedges of the opening,

a spring extending member on one of said members and a recess in theother both within the outer face of said frame when the door is inclosed position, said spring member and recess acting as a latch .tohold the door in such position.

10.` In a hinged-door construction, a frame member provided withapertures adjacent the opposite extremity of the lower edge of the dooropening, a door, and hinge members carried by the door adjacent thelower edge thereof, said hinge members bein formed and arranged toextend through said apertures and to have bearing support therein in theopening and closing movements of `the door, said frame having aninturned portion at the upper edge of said door opening having a recesstherein for the reception of a latch, a spring latch carried by the doorand within the portion of the door which is exposed when the said dooris closed, said latch being within the plane o'f said aperture when saidhinge members bear on the edges of said apertures.

l1. In a hinged-door construction, a frame member provided withapertures adjacent the opposite extremity of the lower edge of the dooropening, a door, and hinge members carried by7 the door adjacent thelower edge thereof, said frame having an inturned portion at the upperedge of said door opening having a recess therein for the reception of alatch, a spring latch carried by the door and Within the portion of ythedoor which is exposed when the said door is closed, said latchcomprising a tapered outer portion for engagement With said recessextending beyond the said door and inwardly and laterally extendingspring portions within the said door and enclosed therein.

12. A structure as specilied in claim l in combination with a springlatch member projecting beyond the. upper edge of the door, so'ilormedand arranged as t0 be depressed by the adjacent edge oi the frame memberon the closing ot' the door, said frame having a recess within its outertace to receive the spring latch and the said hinge members havingrecesses to receive the edges ot the pertorations approximately invertical plane with t-he said latch receiving rccessand distanttherefrom the Width of the door.

- 13. An oven door construction comprising a frame, having a dooropening, a door for said opening, a latch at one edge of said door anda` hinge construction at the opposite edge comprising a vertical slot inthe frame and a hinge member secured to the door and extending throughsaid slot conieaeee fill the slot adjacent the door and preventsubstantialyertical movement of thesame in the slot and a portion ofreduced Width extending away from the door to permit vertical movementof the said member in the slot.

lei. ln the construction specified in claim 13 the said hinge memberhaving its edge opposite the recess eccentric thereto.

l5. In the construction speciiied in claim 9, thehinges comprisinglateral extensions near one edge of the door and inwardly extendingportions projecting from Within the outer edges of said extensionthrough the frame, said lateral extensions covering the portion of theframe through which said inwardly extending portions extend.

Vs/vitness my hand this 13th day of September, 1924's, at the city ofMilwaukee, in the county of Milwaukee, State of Wisconsin.

WALTER c. LINDEMANN.

